JP2006067717A - Charger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charger wherein contact pieces of spring properties serving as electrode terminals are easily assembled, a number of parts can be reduced, and assembling work can be facilitated. <P>SOLUTION: A circuit board 3 and coil spring terminals 4 are assembled inside an upper case 1 and a lower case 2. The coil spring terminals 4 are so formed that one ends of coils 40 are bent into hooks to form connecting ends 41 and the other ends are folded in two stages to form projected contact pieces 42. A recess 20 is formed in the bottom face of the lower case 2, and the coils 40 are fit into there. Guide shafts 21 to be engaged with the coils 40 are formed on one wall of the recess 20, and grooves 22 and 23 to be engaged with the drawn portions extended from the coils 40 are formed in the walls adjacent to the guide shafts 21 on both sides. The coil spring terminals 4 are held in predetermined upright position by this recess 20. The circuit board 3 is assembled to the upper side, and the connecting ends 41 are soldered. The upper case 1 is placed and assembled so that the contact pieces 42 are protruded out of long holes 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a charger that detachably attaches a charging target such as a battery pack or a mobile phone, and charges a secondary battery. More specifically, the present invention relates to an electrode terminal to be charged and a spring property. The present invention relates to an improvement in the assembly structure of contact pieces to be contacted.

  This type of charger has a configuration in which a spring-like contact piece is disposed in a protruding state on a mounting portion formed in a case, as seen in, for example, Patent Documents 1 to 3. A charging target such as a battery pack or a cellular phone is detachably mounted on the mounting portion, and the secondary battery is charged by bringing the contact piece into contact with the electrode terminal to be charged.

  As the spring contact piece, a configuration using a so-called coil spring is often used. In other words, a bent part formed by appropriately bending an extended part extending from the coil part (winding) is used as a contact piece and assembled by fitting the coil part to a support shaft linked to the case, and on the power line side The electrode terminal has a spring property by appropriately connecting to the electrode terminal.

JP 2001-118608 A JP 2000-195561 A Japanese Patent Laid-Open No. 10-64595

  However, such a conventional charger has the following problems. First, in the invention disclosed in Patent Document 1, the spring contact piece (terminal spring) is directly attached to the support portion of the lower case, so that the assembly is improved, but the lead wire is connected to the substrate for wiring. ing. For this reason, wiring materials are necessary and time-consuming.

  In the invention disclosed in Patent Document 2, a spring-like contact piece (contact point) is attached to a substrate, but is supported by a support. For this reason, the number of parts increases and it takes time to assemble.

  In the invention disclosed in Patent Document 3, since the spring-like contact piece (contact spring) is directly attached to the substrate, the number of parts can be reduced and the assemblability can be improved. However, since the positioning of the coil spring is performed on the substrate, there are problems that the size of the substrate and the size of the case are increased, and that the cost is increased accordingly.

  The object of the present invention is to solve the above-mentioned problems. The object of the present invention is to make it easy and easy to assemble the spring-like contact pieces constituting the electrode terminals, reduce the number of parts, and perform charging easily. Is to provide a vessel.

  In order to achieve the above-described object, a charger according to the present invention is configured such that a charging target such as a battery pack or a mobile phone is detachably attached, and a spring-like contact piece is brought into contact with the electrode terminal to be charged. A charger for charging a secondary battery, an upper case having a long hole for projecting the contact piece at a position corresponding to the electrode terminal, a circuit board, and a lower case for assembling the circuit board; A coil spring terminal having one end of the coil portion having a hook-shaped connection end and the other end having the contact piece, and forming a recess into which the coil portion is fitted on the bottom surface of the lower case. A guide shaft that fits the coil portion is formed on one wall, and a groove that fits an extended portion extending from the coil portion is formed on each side wall adjacent to the guide shaft. The shape is Occurs inner circumference and the non-contact portions of the pole tip, it is configured so that a predetermined space is formed between the coil portion and its non-contact portion.

  The guide shaft may be formed in an oval cross section that contacts at least two locations on the inner periphery of the coil portion, and the longitudinal direction of the oval cross section may be oriented along both walls in which the grooves are formed. Furthermore, the circuit board is provided with a mounting hole that fits into the connection end, the coil part is assembled in the recess, the coil spring terminal is held in a predetermined posture, and the circuit board is assembled on the upper side thereof. It is good to.

  By adopting such a configuration, in the present invention, the coil spring terminal can be held in a predetermined standing posture by fitting the coil portion of the coil spring terminal into the recess of the lower case, so that it does not require a special jig for holding. And since a circuit board is assembled | attached from the top, the applicable site | part (connection end) of a coil spring terminal may fit in the attachment hole, and this should just be soldered. Furthermore, this manufacturing is an operation process in which each part is assembled to the lower case in order from the top, and the flow of the operation process is good.

  In this case, in order to hold the coil spring terminal in a predetermined standing posture, it is not necessary to prepare a support member as an individual component, and since it is directly attached to the circuit board, the number of components can be reduced and the cost can be reduced. it can.

  In addition, since the guide shaft and the groove are formed in the recess, the coil portion fits in the guide shaft and the extended portion fits in the corresponding groove, so that the posture of the coil spring terminal assembled in the recess can be reliably maintained. .

  In addition, when the guide shaft is oriented along the two adjacent walls as an oval cross section, the gap between the two adjacent walls widens, making it easy to fit the coil portion to the guide shaft and easy assembly of the coil spring terminal Become.

  In the charger according to the present invention, the coil spring terminal can be held in a predetermined standing posture by fitting the coil portion into the recess of the lower case, and the circuit board is assembled from above, so that the corresponding portion of the coil spring terminal is installed in the mounting hole. (Connecting ends) are fitted together and soldered. For this reason, the man-hour for setting the holding jig can be reduced, and the assembly of the spring-like contact piece serving as the electrode terminal can be performed easily and easily.

  Therefore, in order to hold the coil spring terminal in a predetermined standing posture, it is not necessary to prepare a support member as an individual component, and it can be directly attached to the circuit board, so that the number of components can be reduced and assembly can be performed. Can be easily performed, which is advantageous in terms of cost.

  FIG. 1 is a perspective view showing a preferred embodiment of a charger according to the present invention separately. In the present embodiment, the charger is assembled to the mounting portion 10 formed on the upper surface of the upper case 1 by assembling the circuit board 3 and the coil spring terminal 4 inside the upper case 1 and the lower case 2 that are connected and integrated. A charging target such as a battery pack or a mobile phone is detachably mounted, and the secondary battery is charged by bringing the spring-like contact piece 42 into contact with the electrode terminal to be charged.

  The upper case 1 is formed in the mounting portion 10 with its upper surface greatly recessed, and two long holes 11 for projecting the contact pieces 42 are formed on the back surface of the mounting portion 10. The long holes 11 are arranged at positions corresponding to the electrode terminals to be charged.

  The lower case 2 is formed with a receiving surface for supporting the circuit board 3, and the circuit board 3 is assembled in a predetermined manner. A concave portion 20 is formed on the bottom surface of the lower case 2, and the coil portion 40 of the coil spring terminal 4 is fitted into the inner portion 20 thereof.

  In the recess 20, a guide shaft 21 that fits with the coil portion 40 is formed on one wall, and grooves 22 and 23 that fit with extended portions extending from the coil 40 portion are formed on both side walls adjacent to the guide shaft 21. Each is formed. The guide shaft 21 is formed in an oval cross section that contacts at least two locations on the inner periphery of the coil portion 40, and the length of the oval cross section is oriented along both walls where the grooves 22 and 23 are formed. The major axis of the guide shaft 21 is preferably about 90% with respect to the inner diameter of the coil portion 40.

  The circuit board 3 is formed with a predetermined circuit pattern, and electronic components such as a capacitor 31 and a power jack 32 are mounted in a predetermined manner. The circuit board 3 is provided with two mounting holes 30 at predetermined positions. These mounting holes 30 and 30 are electrode ends of the power line, and are configured to fit into the connection ends 41 of the coil spring terminals 4 and to be electrically connected by soldering.

  The coil spring terminal 4 is processed by extending both ends of the coil portion 40 that exhibits springiness. Then, one end is bent into a hook shape to form a connection end 41, and the other end is bent in two steps to form a protruding contact piece 42. The contact piece 42 comes into contact with the electrode terminal to be charged. Yes.

  2A to 2C are perspective views for sequentially explaining assembly operations. As shown in FIG. 2 (a), first, the coil portion 40 of the coil spring terminal 4 is fitted into the recess 20 of the lower case 2 and is fitted to the guide shaft 21, and the extended portions are formed in the grooves 22, 23. And the coil spring terminal 4 is held in a predetermined standing posture by the repulsive force of the coil portion 40.

Next, as shown in FIG. 2B, the circuit board 3 is assembled on the upper side thereof. At this time, since the connection ends 41 and 41 are fitted in the mounting holes 30 and 30, the parts are soldered and thereby electrically connected.
Then, as shown in FIG. 2 (c), the lower case 2 is assembled by covering the upper case 1 from above, and at this time, the contact piece 42 protrudes from the long hole 11 of the mounting portion 10.

  Therefore, as shown in FIG. 3, when charging, the charging object 5 may be inserted into the mounting portion 10 from above, and the contact piece 42 is pushed by the charging object 5 and pushed back toward the long hole 11. It will contact with the electrode terminal which faces.

  As described above, in the assembly operation, the coil spring terminal 4 can be held in a predetermined standing posture by fitting the coil portion 40 into the recess 20, and does not require a special jig for holding. And since the circuit board 3 is assembled | attached from the top, the applicable site | part (connection end 41) of the coil spring terminal 4 may fit in the attachment hole 30, and this should just be soldered. For this reason, the man-hour for setting the holding jig can be reduced, and assembly can be easily performed. Furthermore, this manufacturing is an operation process in which the parts are assembled to the lower case 2 in order from above, and the flow of the operation process is good.

  Further, since the guide shaft 21 has an oval cross section and a gap between adjacent walls is widened, the coil portion 40 can be easily fitted to the guide shaft 21 and the coil spring terminal 4 can be easily assembled.

  In this case, in order to hold the coil spring terminal 4 in a predetermined standing posture, it is not necessary to prepare the support member as an individual component, and since it is directly attached to the circuit board 3, the number of components can be reduced and the cost can be reduced. Can be reduced.

  Note that the guide shaft 21 only needs to be able to widen the gap between the two adjacent walls. Therefore, the cross-sectional shape is not limited to an ellipse. The length of the cross section is not limited to the direction along both walls in which the grooves 22 and 23 are formed, but may be inclined to any wall side.

  Further, the recess 20 may have a configuration in which the guide shaft 21 is not provided. That is, since the recessed portion 20 is formed to a depth at which the coil portion 40 is fitted, the fitted coil portion 40 can be supported without providing the guide shaft 21 and the coil spring terminal 4 can be held in a standing posture. And next, since the circuit board 3 is assembled on this upper side and the connection end 41 is soldered to the mounting hole 30, the coil spring terminal 4 can be assembled in a correct posture, and even when there is no shaft inside the coil portion 40, The contact piece 42 exhibits springiness. In this case, since the guide shaft 21 is not provided, the mold for the concave portion 20 is simplified, and this is advantageous in terms of cost and facilitates the molding of the lower case 2.

It is a perspective view which isolate | separates and shows suitable one Embodiment of the charger which concerns on this invention. It is a perspective view explaining an assembly work in order, (a) shows the assembly work of a coil spring terminal, (b) shows the assembly work of a circuit board, and (c) shows the assembly work of an upper case. It is sectional drawing of the charger which completed the assembly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Circuit board 4 Coil spring terminal 5 Charge object 10 Mounting part 11 Long hole 20 Recess 21 Guide shaft 22, 23 Groove 30 Mounting hole 31 Capacitor 32 Power jack 40 Coil part 41 Connection end 42 Contact piece

Claims (3)

A charger for removably attaching a charging target such as a battery pack or a mobile phone, and charging a secondary battery by bringing a spring-like contact piece into contact with the electrode terminal of the charging target,
An upper case having a long hole for projecting the contact piece at a position corresponding to the electrode terminal, a circuit board, a lower case for assembling the circuit board, and one end of the coil portion is a hook-shaped connection end A coil spring terminal having the contact piece at the other end;
Forming a recess for fitting the coil portion on the bottom surface of the lower case;
In the recess, a guide shaft that fits with the coil portion is formed on one wall, and grooves that fit with an extended portion extending from the coil portion are formed on both side walls adjacent to the guide shaft,
The charger is characterized in that the outer shape of the guide shaft has a non-contact portion and an inner periphery of the coil portion, and a predetermined space is formed between the non-contact portion and the coil portion. .   The guide shaft is formed in an oval cross section that contacts at least two locations on the inner periphery of the coil portion, and the long side of the oval cross section is oriented along both walls in which the grooves are formed. The charger according to claim 1.   The circuit board is provided with an attachment hole that fits into the connection end, the coil part is assembled in the recess, the coil spring terminal is held in a predetermined posture, and the circuit board is assembled on the upper side thereof. The charger according to claim 1 or 2.

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